该方法描述了一种快速的程序（1,2,3），用于使用氢氧化铜[Cu（OH）2]饱和的铜乙二胺作为溶剂测量1%纤维素溶液的粘度。为方便起见，可将其称为Cu（En）2或CED。该方法是木质素含量超过4%的纸浆的首选方法；然而，许多高得率纸浆，在50%以上的水平，含有足够的木质素（超过10%）干扰测试。落球法可用于漂白和未漂白纸浆的整个范围，非常适合生产控制。然而，根据TAPPI T 222“酸”的定义，木质素含量低于4%的纸浆的首选程序- 木材和纸浆中的不溶性木质素，“is TAPPI T 230”纸浆粘度（毛细管粘度计法），应用于这些纸浆的鉴定。该程序包括制备铜乙二胺、溶解样品、粘度计校准和测量样品溶液的粘度。

This method describes a rapid, procedure (1, 2, 3) for the measurement of the viscosity of 1% cellulose solutions using cupriethylenediamine saturated with cupric hydroxide [Cu(OH)2 ] as the solvent. For 2 convenience, this may be referred to as Cu(En)2 or CED.This method is the preferred procedure for pulps containing more than 4% lignin; however, many high yield pulps, at levels above 50%, contain sufficient lignin (in excess of 10%) to interfere with the test. The falling ball method may be used over the entire range of bleached and unbleached pulps and is well suited to production control. However, the preferred procedure for pulps with less than 4% lignin, as defined by TAPPI T 222 "Acid-Insoluble Lignin in Wood and Pulp," is TAPPI T 230 "Viscosity of Pulp (Capillary Viscometer Method)," which should be used for referee purposes on these pulps.This procedure covers preparation of cupriethylenediamine, dissolving the sample, viscometer calibration, and measurement of the viscosity of the sample solution.